View Single Post
TurboKraft TurboKraft is offline
Registered User
TurboKraft's Avatar
Join Date: Mar 2005
Location: Phoenix, AZ
Posts: 2,656
Originally Posted by copbait73 View Post
Just a point of clarification, have you found the GT3582 will not surge under load on basically stock 930 (3.0-3.3L) engines with the ported compressor housing?
Do you normally apply the same turbine A/R (?) for both stock and modified (400HP) engines?
Correct -- the more stock the engine, the less efficient the engine, so the less it is able to consume the greater airflow at lower rpms and the greater the need for the ported shroud to reduce or eliminate surge.

Ex: we had a 930 come to us for tuning on the dyno, only mods were aftermarket headers, 3" muffler, and a GT35R. Stock intercooler, stock boost, stock cams, stock P&Cs. It had compressor surge. The owner took our advice on getting a ported shroud intake and upgrading the intercooler. He didn't bring the car back, did it elsewhere, but the surge is gone. I wouldn't attribute that to the ebay intercooler he cobbled on.

Another 3.3L with stock heads and P&Cs, SC cams, GHL headers, 3" muffler, Andial intercooler. Compact "E" cover on the GT35R that some people claim causes the surge due to the smaller A/R. No surge on that car, on the dyno or road.

Originally Posted by copbait73 View Post
I wouldn't buy it, same goes for ball bearings.
Chris Carroll
TurboKraft, Inc.
Tel. 480.969.0911
email: -
Old 06-23-2011, 10:53 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #17 (permalink)